Mascara brush



FIG. 1 is a detailed view of the mascara brush, showing our new design;

FIG. 2 is a top view of the mascara brush;

FIG. 3 is a bottom view of FIG. 2;

FIG. 4 a reduced perspective view of FIG. 2;

FIG. 5 is s a right side view of FIG. 2; and,

FIG. 6 is a left side view of FIG. 2. 

The ornamental design for a mascara brush, as shown and described. 